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PACEMAKER
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
A horse used to set the pace in racing
Synonyms:
Classified under:
Hypernyms ("pacemaker" is a kind of...):
bangtail; race horse; racehorse (a horse bred for racing)
Sense 2
Meaning:
An implanted electronic device that takes over the function of the natural cardiac pacemaker
Synonyms:
artificial pacemaker; pacemaker
Classified under:
Nouns denoting man-made objects
Hypernyms ("pacemaker" is a kind of...):
electronic device (a device that accomplishes its purpose electronically)
Sense 3
Meaning:
A specialized bit of heart tissue that controls the heartbeat
Synonyms:
cardiac pacemaker; pacemaker; SA node; sinoatrial node
Classified under:
Hypernyms ("pacemaker" is a kind of...):
cardiac muscle; heart muscle (the muscle tissue of the heart; adapted to continued rhythmic contraction)
Sense 4
Meaning:
A leading instance in its field
Example:
the new policy will be a pacesetter in community relations
Synonyms:
pacemaker; pacesetter
Classified under:
Nouns denoting cognitive processes and contents
Hypernyms ("pacemaker" is a kind of...):
example; exemplar; good example; model (something to be imitated)
Context examples:
An electrocardiographic finding in which the ventricular rhythm is controlled by an electrical impulse from an artificial cardiac pacemaker.
(Paced Ventricular Rhythm, NCI Thesaurus/CDISC)
An electrocardiographic assessment of the rate of firing of a an artificial, mechanical pacemaker.
(Pacemaker ECG Assessment, NCI Thesaurus)
On geologic time scales (thousands to millions of years), variations in Earth's orbit are the pacemakers of the ice ages.
(Deep-sea sediments lead to new understanding of solar system, National Science Foundation)
Treatment to restore a normal heart rhythm may include medicines, an implantable cardioverter-defibrillator (ICD) or pacemaker, or sometimes surgery.
(Arrhythmia, NIH: National Heart, Lung, and Blood Institute)
The removal of one or more lead wires from the heart in a patient with pacemaker or implantable defibrillator.
(Lead Extraction, NCI Thesaurus)
Inappropriate pacemaker detection of electrical signals not related to cardiac depolarization of the lead chamber.
(Cardiac Pacemaker Oversensing, NCI Thesaurus)
A man in white clothes, who could only be the surviving half-breed, was running as one does run when Death is the pacemaker.
(The Lost World, by Sir Arthur Conan Doyle)
Issue associated with the inability of device and/or device components to achieve successful depolarization and contraction of a cardiac chamber caused by a pacemaker output pulse.
(Capturing Issue Medical Device Problem, Food and Drug Administration)
Failure of pacemaker to detect appropriate cardiac depolarizations.
(Cardiac Pacemaker Undersensing, NCI Thesaurus)
This area contains pyramidal cells that send axons to the CA1 field and acts as a pacemaker, setting the pace for neuronal firing in the hippocampus.
(CA3 Field of the Cornu Ammonis, NCI Thesaurus)
